import Vue from 'vue'
import Router from 'vue-router'
import login from '../components/login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import GoodsList from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'

Vue.use(Router)

const router = new Router({
  routes: [
    { path: '/', redirect: 'login' },
    { path: '/login', component: login },
    { path: '/home', 
      component: Home, 
      redirect: '/welcome',
      children: [{ path: '/welcome', component: Welcome }, 
                { path: '/users', component: Users }, 
                { path: '/rights', component: Rights }, 
                { path: '/roles', component: Roles }, 
                { path: '/categories', component: Cate }, 
                { path: '/params', component: Params }, 
                { path: '/goods', component: GoodsList },
                { path: '/goods/add', component: Add },
                { path: '/orders', component: Order },
                { path: '/reports', component: Report }]
    }
  ]
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行；next()放行，next('/login')强制跳转
  if (to.path === '/login') return next()
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router